Cement powders and method of producing acidproof mortars therefrom



OR PLAS Patented Jan. 6, 1942 Examii CEMENT POWDERS AND METHOD OF PRO- DUCING ACIDPROOF MORTARS THERE- FROM Karl Dietz, Kronberg in Taunus, and Franz Privinsky, Hofheim in Taunus, Germany, assignors, by mesne assignments, to Pen-Chlor, Incorporated, Philadelphia, Pa., a corporation of Delaware No Drawing. Application July 29, 1939, Serial 14 Claims.

The present invention relates to cement powders and to a method of producing acid-proof mortars therefrom.

In recent times acid-proof mortars made with the aid of water-glass solutions are chiefly used in constructions which are to be resistant to acids. These acid-proof mortars have the property of self-hardening and when bricks are cemented with said mortars there are obtained ce- In Germany August 1, 1938 sium silicate solution. If one of the sulfa-chlorides Has a low melting point so that it is liquid the mortar a waterlass solution in which the proportion by weight of $522325 exceeds 1:3.5.

mentations which are acid-proof and water-proof It is suitable to use a water-glass solution in Beesaaam; these additions are obtained from fluorine compounds. Already a relatively small lution of th is lg;

mantis: these substances added to the cement powder is sufiicient for producing the abovenamed properties. In most cases sodium silicate solutions are added to the cement powders for producing the mortars of the kind described above.

In some cases, however, the above-named mortars have not been found useful in acid-proof constructions and this particularly when containers which are built with acid-proof bricks cemented with acid-proof mortars or when acidproof linings are exposed to chemical processes which are performed by causing the substances to circulate. Moreover, the presence of fluorine or of potassium hydroxide in the cementations may be dangerous thecementations are brought in contact with sulfuric acid.

TNow we have found that self-hardening acidproof and water-resistant waterlass mortars can be prepared which do not show the afore'- named drawbacks by using as an addition which causes the self-hardening aromatic sulfochlorides for instance benzene-sulfochloride, paratol ene-suliochloride, meta-n1troEenzene-sulfm chloride, ortHo-mtrotoluene-sulfocffioriHe or a. I- Haan beta-naph a ene-s 00 made, 1n- Ease of th a -reac1ve tions.

The cement powders are mixed with tassium silicate. when small amounts of these aromatic acid-"roof filling agents; when used this cement powder E mixed with liguig potaswhich the proportion by weight of SiOxHzO is between 1:3.0 and 1:2.5, as described in our copending U. S. application Serial No. 224,318 filed August 11, 1938. When using a watggg l ass soas. s- -pbta c merits which are m lsislrilesssmsl rlatlli uiw 3W1?" ms also possible to add the potassium silicat in the form of a owder together w1th the othe consti uents e cement pgwd er which whe used is then mixed w water. 4

The following exampies serve to illustrate the invention, but they are not intended to limit it th to, the parts being by weight:

g? 90 parts of pulverized quartz are mixed wi parts of clay and 5 partsTfpara-toluenesulfochloride in the pulverized condition. For use 25 ccl'oi pgtassium s iligatesolution of the specific gravity of 30 B. are added to the mixture. The composition of the potassium silicate solution is as follows: 8 per cent of K20, 20 per cent of S102 and 7 2 per cent of H20.

After hardening the cements obtained with the aid of this mortar are resistant to acids of all kinds, particularly also to sulfuric acid and ace acid.

In a cement powder as described in Examp e 1 the quantity of para-toluene sulfochloride is replaced by the san'i'e' proportion by weight 61" benzege-sulfochlonde which before mixing it witH the cement powderis absorbed in the liquid condition by 2 per cent of kieselguhr calculated upon the cement powder. Ificbnseqiience thereof only 88 per cent of pulverized quartz are used.

The cement powder is worked up as'described in Example 1. The cements obtained have the same properties as those of Example 1.

A cement powder is prepared from 8 parts of pgra toluene-sulfochloride, 5 parts of clay, and 62 parts of pulverizecl'quartz, 25 parts of solid potassium silicate powd'e'r are added theretol in this potassium silicate powder the proportion by weight of SiOzzHzO is 2.5:1; the powder has a moisture content of 25 per cent. When being used the cement powder is mixed with water. The cements obtained have the same properties as those of Example 1.

1; (4 2 parts of clay and 8 parts of para-toluene sulfochloridearadded to 90 partsof a mix iiure of acid-proof additions (pulverizedguartz,

siliceous sinter, clay and gfanula t ed quartzll" which consists in mixing cement powders consisting of pulverulent aromatic sulfochlorides and acid-proof filling substances with potassium'silicate and water.

2. A method of producing acid-proof mortars which consists in mixing cement powders consisting of pulverulent aromatic sulfochlorides selected from the group consisting of benzene sulrochloride, para-toluene sulfochloride, meta-nitrobenzene sulfochloride, 'ortho-nitrotoluene sultochloride, alpha-naphthalene sulfochloride and beta-naphthalene sulfochloricle, and acid-proof filling substances with potassium silicate and water.

3. A method of producing acid-proof mortars which consists in mixing cement powders consisting of liquid benzene sulfochloride absorbed in diatomaceous earth and acid-proof filling substances with potassium silicate and water.

4. A method of producing acid-proof mortars which consists in mixing cement powders consisting of pulverulent aromatic sulfochlorides and acid-proof filling substances with liquid potassium silicate solution.

5. A method of producing acid-proof mortars which consists in mixing cement powders consisting of pulverulent aromatic suliochlorides and acid-proof filling substances with liquid potassum silicate solution in which the proportion 01 $10: to H2O is greater than 1 to 3.5.

6. A method of producing acid-proof mortars which consists in mixing cement powders consisting of pulverulent aromatic sulfochlorldes and acid-proof filling substances with liquid potassium silicate solution in which the proportion of $102 to H2O lies between 1 to 3.0 and l to 2.5.

7. A method of producing acid-proof mortars which consists in mixing cement powders consisting of pulverulent aromatic sulfochlorldes selected from the group consisting of benzene suli'ochloride, para-toluene sulfochloride, meta-nitrobenzene sulfochloride, ortho-nitrotoluene sultochloride, alpha-naphthalene sulfochloride and beta-naphthalene suliochlorlde, and acid-proof filling substances with liquid potassium silicate solution.

8. A method of producing acid-proof mortars which consists in mixing cement powders consisting .of pulverulent aromatic sulfochlorides selected from the group consisting of benzene sul- Iochloride, para-toluene sulfochloride, meta-nitrobenzene sulfochloride, ortho-nitrotoluene sulfochloride, alpha-naphthalene sulfochloride and beta-naphthalene sulfochloride, and acid-proof filling substances with liquid potassium silicate solution in which the proportion of $102 to H2O is greater than 1 to 3.5.

9. A method of producing acid-proof mortars which consists in mixing with water cement powders consisting of pulverulent aromatic suliochlorides, acid-prod! filling substances and pulverulent potassium silicate.

10. A method of producing acid-proof mortars which consists in mixing with water cement powders consisting oi! pulverulent aromatic 'sulfochlorides selected trom the group consisting of benzene sulfochloride, para-toluene sulfochloride, meta-nitrobenzene sulfochloride, orthonitrotoluene sulfochloride, alpha-naphthalene. suliochloride and beta-naphthalene sulfochloride, acid-proof filling substances and pulverulent potassium silicate.

11. A cement powder which, when mixed with liquid potassium silicate solution, yields acidproot mortars, said cement powder consisting of pulverulent aromatic sulfochlorides and acidproof filling substances.

12. A cement powder which, when mixed with liquid potassium silicate solution, yields acidprooi mortars, said cement powder consisting of pulverulent aromatic sulfochlorides selected from the group consisting of benzene sulfochloride, para-toluene sulfochloride, meta-nitrobenzene sulfochloride. ortho-nitrotoluene sulfochloride, alpha-naphthalene sulfochloride and beta-naphthalene suliochloride, and acid-proof filling substances.

13. A cement powder which, when mixed with water, yields an acid-proof mortar, said powder consisting oi pulverulent aromatic suliochlorides, acid-proof filling substances and pulverulent potassium silicate.

14. A cement powder which, when mixed with water, yields an acid-proof mortar, said powder consisting of pulverulent aromatic sulfochlorides selected from the group consisting of benzene sulfochlorlde, para-toluene sulfochloride, metanltrobenzene sulfochloride, ortho-nitrotoluene sulfochloride, alpha-naphthalene sulfochloride and beta-naphthalene sulfochloride, acid-proof filling substances and pulverulent potassium silicate.

KARL DIETZ. FRANZ PRIVINSKY. 

